. The sum of the reciprocals of object distances and image distance is equal to the ____ of a mirror :

Related questions

Which is the nearest planet to the Sun

---

Why do we need a Standard Meridian for India

---

The smallest planet in the solar system is

---

The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat in the west

---

Define the following Threshold frequency and work function

---

Which one of the following forces is a contact force

---

Fill in the blank The planet farthest from the Sun is

---

The movement of Earth around its axis is called

---

Name the largest planet in the solar system

---

The pitch of sound depends on frequency

---

Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

---

A pond contains clean water. Which of the following activities will produce least pollution of water

---

The phenomenon of marble cancer is due to

---

Boojho wishes to contribute in reducing air pollution. Which vehicle should he use for going to school

---

Explain with a diagram how you can locate pole star with the help of the constellation Great Bear (Ursa Major).

---

Write the names of all planets in Fig. 17.8.

---

Look at Fig. 17.7 carefully and answer the following question

---

Explain why we always see the same side of moon

---

Fig. 17.6 shows comets without their tail. Show the tails of the comets at position A, B, and C. In which position will the tail be longest

---

Suppose the moon emits light of its own. Would it still have phases? Justify your answer

---